Mail Services

Black Bag Service

Black Bag Bins

UCAR's Black Bag Service is administered through the Transportation Services Department. It is an inter-site express package service provided for urgent document deliveries.

To send an item "black bag," go to any front desk and complete a tag with the name, destination, and extension of the recipient.

For more information, contact: Jean Hancock, ext. 8504

Types of Mail

First Class Stamps

First Class

Any mailable matter may be mailed as First Class mail. The following examples are considered First Class matter and must carry postage at First Class or Priority mail rates. Further Information:

Bulk Mail

Bulk Business Mail includes third-class, bound printed matter, and small parcels weighing less than 16 ounces.

International Mail

Please Note: It is the responsibility of the sender to prepare items and to address them clearly and correctly, consider the nature of the articles being mailed and the distance they must travel to reach the addressee.


Logistics Operations provides numerous shipping related services including:

Further Information:

Mail Distribution

Outgoing Mail Bin

All mail addressed to UCAR/NCAR is automatically routed to P.O. Box 3000, regardless of address (facility) listed.

Below is a schedule of the mail pick up and delivery (times approximate):

  • All UCAR Buildings – 13:30
  • F & A 10:30 and 14:30
  • Mesa Lab - 13:30
  • Jeffco – 11:00

Mail Processing



CG3 Mail Room

Phone: x1922
Hours: 7:30am-4pm





US mail is sorted and processed at CG3. Mail is picked up at the Post Office at 7:30 a.m. and brought back to the mail room for sorting. ALL mail picked up during the day leaves CG3 at 3:30 p.m. and taken to the Post Office.

To help us expedite the mail, please do the following:

  • Address envelopes/parcels with accurate and complete information (don't forget the country on international mailings).
  • Place your program account number  on the envelope under the return address and the name of the person sending the letter.
    • We need this information for charges related to the mail.
    • Most pre-printed labels have a place for all of this information.
    • Letters without this information will be delayed, and possibly opened to determine the account number.
  • All international mail collected will be sent "air mail" unless otherwise requested by sender.
    • For other options (such as international registered) and prices available, please contact the mail room, x1922.
  • Bulk (pre-sorted third class) mailings should be batched and sorted according to USPS regulations.
    • For a written procedure, or general guidance with bulk mailings, contact the mail room, x1922.
  • Logistics Operations is NOT responsible for any personal mail.


Please Note: Logistics Operations receives many phone calls and emails concerning the tracking of personal mail. As an FYI, when the USPS shows a mail piece has been has only been delivered to the local sort facility. It usually takes another 3 - 4 days for Logistics personnel to actually receive it. Logistics Operations assumes no liability for any personal mail.


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